Relay scheme based on Distributed Luby Transform codes for InterPlaNetary Internet

Distributed Luby Transform (DLT) codes have been proposed to improve the robustness and system throughputs for multi-source single-sink networks by exploiting the benefits of Network Coding (NC) at a single relay. All the proposed schemes such as the DLT and Soliton-Like Rateless Coding (SLRC) have attempted to maintain Robust Soliton Distribution (RSD) or Soliton-Like Distribution (SLD) for the output data at the relay. This result in some source symbols to be discarded, thereby degrading the throughput. In this paper, we have proposed a novel method called the Full DLT (FDLT) coding scheme to be applied in the InterPlaNetary (IPN) Internet scenario comprising two sources and one relay. The aim of the proposed scheme is to fully utilise the source symbols so as to reduce the overheads and improve energy efficiencies at the sources while maintaining low overhead at the relay. In addition, almost no buffer is needed in the proposed scheme so the relay can have limited storage space, and the proposed scheme is resilient to the churn rates of the nodes. The simulation results have shown that the proposed scheme outperforms the aforementioned schemes with respect to source overheads and total overhead in addition to preserving the benefits of NC and LT codes.